Installation Procedure

WARNING: This page is about a different car, the 2003 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Coat the seal ring of the water pump with silicone grease, GM P/N 12345579 (Canadian P/N 1974984) or equivalent.
Important: Ensure the O-ring seal is properly positioned to the water pump.
Install the O-ring seal to the water pump.
Install the water pump into the engine block.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the water pump bolts.
Tighten

Tighten the water pump bolts to 25 N.m (18 lb ft).

Fig 1: Installing Water Pump & Bolts
Courtesy of GENERAL MOTORS CORP.
Install the timing belt cover. Refer to TIMING BELT COVER REPLACEMENT .
Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .